Incorrect message detail in HasOneValidator

[lindyhopchris]

The following error message from a HasOneValidator is not adding the relationship name to the detail member:

{
    "status": "400",
    "code": "required",
    "title": "Required Relationship",
    "detail": "Missing required relationship \"%s\".",
    "source": {
        "pointer": "\/data\/relationships\/application"
    }
}